UPDATE: FIRST TEST MULE WITH ACTUAL CAMARO BODY HERE:
http://www.camaro5.com/forums/showthread.php?t=1814
Here's the first spotted Camaro test mule in the U.S. The only other mules spotted so far have been in Australia. This shell car is a middle eastern market Lumina SS (a rebadged Holden Commodore).
Previous pics showed the mule under a Holden badged body but these show the mule under a Chevy badged body.
This shell car is a middle eastern market Lumina SS (a rebadged Holden Commodore). The Lumina SS from the middle east is actually a 2-door coupe so the two doors here are only camouflage. The actual mule underneath has a shorter wheel base and lower roofline.